Mitsubishi Electric MELSEC iQ-R Series User Manual page 229

■For "Ball screw" + "Reduction gear"
When the ball screw pitch is 10 mm, the motor is the HK-KT (67108864 pulses/rev), and the reduction ratio of the reduction
gear is 9/44
Motion module
Command
Control
unit
value
First, find how many millimeters the load (machine) will travel (S) when the motor turns one revolution (AP).
AP (Number of pulses per rotation)
S (Movement amount per rotation)
• To control the motor HK-KT, set the servo parameters of MR-J5(W)-G as follows. Electrical gear numerator (PA06): 16
Electrical gear denominator (PA07): 1
Substitute this for the above expression (1).
At this time, make calculation with the reduction ratio 9/44 remaining as a fraction.
AP 4194304 [pulse]
=
S 10000.0 [μm] × 9/44
4194304 × 44
=
10000.0 × 9
184549376
=
90000.0
23068672
=
11250.0
23068672 (AP)
=
1125.0 (AL) × 10 (AM)
Thus, AP, AL, and AM to be set are as follows. These two examples of settings are only examples. There are settings other
than these examples.
Setting value
AP = 23068672
AL = 11250.0
AM = 1
or
Setting value
AP = 23068672
AL = 1125.0
AM = 10
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pulse
AP
Control
Electronic gear numerator (PA06): 16
unit
AL × AM
Electronic gear denominator (PA07): 1
pulse/16
= 67108864 [pulse]  1/16
= 4194304 [pulse]
= Ball screw pitch  Reduction ratio
= 10 [mm]  9/44
= 10000.0 [m]  9/44
23068672 (AP)
=
11250.0 (AL) × 1 (AM)
Setting item
[Pr.2]
[Pr.3]
[Pr.4]
Setting item
[Pr.2]
[Pr.3]
[Pr.4]
search engine
pulse × 16
Servo amplifier
pulse
Feedback pulse
When the control unit is
"mm", the minimum
command unit is 0.1 μm.
8.2 Functions for Compensating the Control
Machine
M
Reduction
ENC
ratio 9/44
8 CONTROL SUB FUNCTIONS
8
227